Handle for rotary tools



(No Model.)

a J. F. STEWARD.

HANDLE FOR ROTARY TOOLS.

No. 460,256. Patented Sept. 29, 1891.

WWW

I m: NDRRR! PETERS cm, Pnoro-uwm, wAsmmimN, a. c.

UNITED STATES PATENT OFFICE.

JOHN F. STEWARD, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO ELIAS M. \VATSON, OF BELOIT, VISCONSIN.

HANDLE FOR ROTARY TOOLS.

SPECIFICATION forming part of Letters Patent No. 460,256, dated September 29, 1891. Application filed March 22, 1890- Serial No. 344,898. (No model.)

To all whom it may concern:

Be it known that I, JOHN F. STEWARD, of Chicago, in the county of Cook and State of Illinois, have invented an Improvement in Handles for Rotary Tools, of which the following is a full description, reference being bad to the accompanying drawings.

The object of my invention is to provide a handle forrotarytools, such as screw-drivers, reamers, countersinks, boring-bits, 850.; and its nature consists in providing a stock into which the tools may be inserted, or on which the tool may be formed, if preferred, so constructed that the part which the hand grasps shall be the wrist of a crank, said wrist being diagonal to the axis of rotation of the arbor of the tool-handle and terminating at a point near the intersection of the axis of the toolarbor and that of the crank-wrist, if both were extended, so that the crank, and hence the tool, may be rotated by a movement of the hand that holds it simply bya movement of the hand in an orbit,with the wrist of the operator as an axis. The movement of the hand will be understood by referring to the fact that a person may take a walking-stick in hand and by a fiexure of the wrist make the stick describe a cone. The orbital movement of the diagonal wrist of my tool-holder describes such a cone.

Figure 1 shows my invention in a simple form consisting, essentially, in a rod with a tool formed on one end and a crank havinga diagonal wrist formed on and terminating the other end. Fig. 2 represents a tool-holder having a modified form of crank-arm, and what may practically be considered to be a two-part wrist, the arm of the crank given such an angle that it may serve to be grasped so that the free hand may help to do the work.

A is a shaft, bent or otherwise constructed, so as to have a crank with at least one diagonal wrist and that terminating one end of the device, the tool terminating the other.

In order to render the holder easily operated, I provide the crank-wrist with the antifriction sleeve D, and, in case more than one part of the crank be so designed as to be grasped, also the sleeve D.

Any suitable socket may be provided in order to adapt the holder to interchangeable tools-as, for instance, that shown at C in Fig. 2.

\Vith the sleeve D grasped in thehand the tool-holder may be rotated at quite a rapid rate, and the other hand being free it may hold any small work that is being operated upon. The sleeve D is prevented from working out of place by the collar E, which may be secured to the rod that forms the parts of the crank and wrist in any suitable manner and the head a. The said collar and the head a but form parts for holding the sleeves in place and require but to present surface sufficient to prevent wear.

In order that the modification shown in Fig.

2 may be used as an ordinary carpenters brace, I have a short wrist at the part of the crank having the greatest throw parallel, or substantially so, with the axis of rotation of the shaft and apply thereto the sleeve D For convenience in manufacture I so round the ends of the sleeve D that they may fit into the ends of the sleeve D and D, the latter being hollowed to correspond. It is obvi- 7'5 ous that the cupping process may be reversed. I show the sleeve D in Fig. 1 in dotted lines only. So placed, it will, even though the angle' is great, be convenient when the toolholder is designed for screw-drivers, because 0 the free hand of the operator may add force when turning the screw home.

I/Vith the sleeve D made very long and the end at greatest throw adapted to be grasped by the free hand the holder may also be used 5 as an ordinary carpenters brace.

What I claim is 1. A handle for rotary tools, consisting of a shaft upon which a tool is formed or bywhich a tool is held at one end thereof and provided with a crank having a wrist which terminates said shaft at the other end thereof, said wrist diagonal relative to the axis of rotation of the shaft, substantially as described.

2. A handle for rotary tools, consisting of a shaft upon which a tool is formed or by which a tool is held at one end thereof and provided with a crank having a wrist which terminates said shaft at the other end thereof, said wrist diagonal relative to the axis of rotation of the I 00 shaft and provided with an anti-friction sleeve, substantially as described.

3. A handle for rotary tools, consisting of a shaft upon which a tool is formed or by which a tool is held at one end thereof and provided with a crank having a wrist which terminates said shaft at the other end thereof, said wrist diagonal relative to the axis of rotation of the shaft and also havinga portion of said crank- Wrist intermediate the diagonal termination and the arm of the crank parallel with the axis of rotation of the cranked shaft, substantially as described.

4. A handle for rotary tools, consisting of a shaft upon which atool is formed or by which a tool is held at the end thereof and provided with a crank having a wrist which terminates said shaft at the other end thereof, said wrist diagonal relative to the axis of rotation of the shaft, and also having a portion of said crankwrist intermediate the diagonal termination,

and the arm of the crank parallel with the axis of rotation of the cranked shaft, said parallel portion of the wrist provided with an anti-friction sleeve, substantially as described.

5. A handle for rotary tools, consisting of a shaft upon which atool is formed or by which a tool is held at one end thereof and provided with a crank-arm diagonal relative to the axis of rotation of the said shaft and provided with an anti-friction sleeve, as D, said crankarm having a wrist which terminates said shaft at its other end, the said wrist diagonal relative to the axis of rotation of the said shaft, substantially as described.

JOHN F. STEWARD. \Vitnesses:

L. W. ELLIS, S. W. BRAINERD. 

